#include <bits/stdc++.h>
using namespace std;
using uint=unsigned int;
using ll=long long;
using ull=unsigned long long;
using i128=__int128;
const int N=1e6+5;

void solve(){
    int n,d;
    cin>>n>>d;
    string s;
    cin>>s;
    for(int i=n-1;i>=0;i--){
        if(s[i]=='@'&&d){
            s[i]='.';
            d--;
        }
    }
    cout<<s;
    return;
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    solve();
    

    return 0;
}